Local authorities in the southern Russian city of Sochi have rejected a request to erect a memorial plaque to honor slain opposition politician Boris Nemtsov.

The local branch of the Party of Progress, which made the request, announced the city's refusal on its website on June 19.

The party said the request was rejected for several reasons, including the lack of a statement of consent from Nemtsov's relatives, the lack of a death certificate, and the failure to obtain the agreement of the owner of the building where the plaque was proposed to be hung.

Nemtsov, a former deputy prime minister who was a fierce critic of Russian President Vladimir Putin, was shot dead in Moscow on February 27.

He was born in Sochi in 1969 and ran unsuccessfully for the post of Sochi mayor in 2009.